docs: def save_config(self):
          """ Save the conf file """
          if not os.path.exists(self._conf_dir):
              os.makedirs(self._conf_dir)
          conf_file = os.path.join(self._conf_dir, "dql.json")
          with open(conf_file, "w") as ofile:
              json.dump(self.conf, ofile, indent=2)